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Microsoft Exchange 2003 and Active Sync

We have Exchange 2003 in a cluster mode. We have service pack 2 and Version # 6.5, Build 7638.2.
We have active sync configured and its working fine for our IOS devices. but sometime user gets a message on their iphone that cant get an email and that person keep on getting the same message if he is pressing the  refresh button.

I checked the event viewer and every time that happened i got an error message in event viewer as below:
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Event Type:      Error
Event Source:      Server ActiveSync
Event Category:      None
Event ID:      3005
Date:            9/4/2012
Time:            5:07:45 PM
User:            Domain\username
Computer:      ComputerName
Description:
Unexpected Exchange mailbox Server error: Server: [servername.domain.com]
 HTTP status code: [503]. Verify that the Exchange mailbox Server is working correctly.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
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amitbhardwaj100
Asked:
amitbhardwaj100
2 Solutions
 
pclinuxguruCommented:
From googling the event ID it's possibly a permissions issue or misconfiguration...
You can try this one first
http://support.microsoft.com/kb/937635

If that doesn't help this was another KB someone mentioned fixing their issue
http://support.microsoft.com/kb/817379
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Brad BouchardInformation Systems Security OfficerCommented:
Just for giggles, try this:  www.testexchangeconnectivity.com

Make sure to select to manually put the domain settings in and check all 3 checkboxes at the bottom.  Let me know the results.

Also, 503 usually does indicate permissions issues and I would check IIS to ensure nothing has changed on any virtual directories.
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amitbhardwaj100Author Commented:
I am not getting 503 error message all the time. its only few times. most of the time Active Sync is working, its only some time a day user gets "cannot get email" error on their devices and i got the 503 Active sync error on event viewer on exchange.
so what i am thinking it might not be a permission issue but maybe some tweaking of IIS.

Any information will be highly apperciated.

Thanks,
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amitbhardwaj100Author Commented:
Any suggestion Experts...
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Alan HardistyCommented:
Please have a read through my article and check your IIS settings to make sure they are optimal.

http://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/A_1798-Exchange-2003-Activesync-Connection-Problems-FAQ.html

If you make changes - visit the test site mentioned and re-run the test.

Fix any errors and if you still have problems, then updating the version of massync.dll may be an option that helps.

http://support.microsoft.com/kb/967046
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